Wondering if anyone else has had this issue and figured out how to fix it. I have a 2014 750LiX. When I have the climate control in SYNC mode the rear fan will randomly start blowing on high speed for about 5 seconds and then go back to where it was set. This continues indefinitely unless I take the system out of SYNC and turn the rear fan off. When the fan blows on high the rear screen shows the same low fan speed as the front, even though it is clearly blowing much higher. Any thoughts?